Gulf Islands Driftwood, Dec. 5 2007 Among all the old pagan holy days, Yuletide, held over the winter solstice, was universally celebrated by all of the Nordic tribes before their conversion to Christianity. The holiday's importance is further attested by the fact that ancient Yuletide traditions are best preserved. Having survived conversion and integration into the new religion, pagan Yuletide customs had a profound impact on the evolution of Christmas.